Machine for cutting thong-holes.



PATBNTBD SEPT. 19, 1905.

` C. BBERLE. MACHINE FOR CUTTING THONG HOLES.-

Y APPLICATION FILED 0CT.10,1904.

UNITED sTATEs PATENT oEEIoE.

MACHINE FOR CUTTING THONG-HOLES,I

Speciiioation of Letters Patent.

Patented sept. 19, 1905.

Application filed October 10, 1904. Serial No. 227,859.

l T all. whom/ it may concern.'

Be it known that l, CHARLES EBERLE, a citizen of the United States, residing at Dallas, Texas, have invented a new and useful Machine for Cutting Thong-Holes, of which the following is a specification.

My invention relates to leather-working machines, and more particularly to machines for cutting holes in leather for the purpose of sewing in thongs and the object is to rovide machines for cutting holes in leather or thongs more uniformly and much faster than can be done as heretofore done by hand, and thus save time and labor. Such machines will be particularly useful in collar manufacturing. Collars sewed with wide thongs are much stronger and more durable than collars sewed with cords or round thongs.

Other objects and advantages will be fully explained in the following description, and the invention will be more particularly pointed out in the claim.

Reference is had to the accompanying drawings, which form a part of this application and specication.

Figure 1 is a side elevation of the machine, with the casing thereof shown in section, illustrating the disposition of the various elements. Fig. 2 is a perspective view of the presser-foot. Fig. 3 is a broken vertical section as seen from the right of Fig. 1. Figs. 4 and 5 illustrate the cams for actuating the lever and the rock-shaft near the bottom of the machine. Fig. 6 illustrates by side elevation and end view two styles of cuttingawls or cutters. Fig. 7 is a perspective view of the crank rock-shaft. Fig. 8 is a plan view of the foot-plate.

Similar characters of `.reference are used to indicate the same parts throughout the several views.

The machine is provided with a suitable casing 1, in the upper part of which is located a driving-shaft 2, journaled in bearings 3 and 4. A drive-wheel or balance-wheel 5 is fixed on shaft 2, and a wheel or disk 6 is fixed on the forward or outer end of the shaft 2. A pin 7 is fixed in the wheel 6 for actuating the cutter 8. This pin 7 is eccentrically disposed in the wheel 6. A movable bearing 9, engaging the pin 7, is mounted in a groove in a block 10, which carries the cutter 8. The bearing 9 has a circular"l motion by reason of the turning of the wheel 6 and a transverse motion relative to the block vor blade-carrier 10. The block or cutter-carrier is thus given a vertical reciprocal motion by the pin 7. This action makes the machine capable of cutting holes in the material fed to themachine. A bearing 11 for the cutter 8 is secured in the block 10, and the cutter-blade may be secured in the bearing 11 by a setscrew. The block 10 also carries the presserfoot 12. A recess is cut in the block 10 for a spiral spring 13. A presser-foot carrier 14 has a shoulder 15 resting on a ledge 16 at the bottom of block 10 and which partly closes the recess in said block. The upper part of the presser-foot carrier extends up within the spiral spring to some extent. Thepresserfoot 12 may be secured on the carrier 14 by a set-screw. The spring 13 will keep the presser-foot pressed down, and in the vertical reciprocal motion of the block 10 the presser-foot will strike the foot-plate 17 before the block 10 makes its full beat and will remain for an instant or very short time on the foot-plate afterthe block 1() starts upward. This enables the presser-foot to perform its part in holding the material in place. The machine is provided with feeding mechanism.` The shaft 2 carries cams A and B. These cams actuate pitman-rods 18 and 19. The pitman 19 is pivotally connected to the lever 20, and the pitman 18 is pivotally connected to a crank 22, which is rigid with the shaft 21. The pitman 18 engages the cam A by means of a yoke 23. The pitman 19 may be provided with a bearing 24 to be engaged by the cam B. The bearing 24 is ressed by gravity against the cam B. uides 25 may be provided to maintain the vertical position of the pitman 19. The lever 2() is fulcrumed at 26. The lever 20 and the rock-shaft 21 both together actuate the feed-blade carrier 27, which is given a vertical and transverse motion by the lever and rock-shaft. The block 27 has two flat lugs 28, which are engaged by the lever 20 to give this block a vertical motion. The only function of the lever 20 is to give a vertical reciprocal motion to the feed-blade carrier 27. The feed-blade 29 is fiat and may be secured in the carrier` 27 in any suitable manner. The carrier 27 is given a 'transverse motion by the block 30. therein to receive the carrier 27. The block 30 is given a transverse motion by the bifurcated or forked crank 31, which engages a pin 32, mounted in the block 30. The pin or bolt 32 is mounted in a vertical slot in the IOO The block 30 has a groove IIO block and may be secured at different heights in said block by a nut 33. The object of this pin being set at different heights is to vary the length of the stroke of the feedblade 29. The blade can be given a longer or shorter stroke by setting this pin at different heights in the block 30. The crank 31 engages the pin loosely and simplyrocks to shove the block 30 crosswise the machine to a limited extent. thus has an upward and transverse motion in feeding and a downward and transverse motion in assuming its normal position.

The foot-plate 17 has a feed-blade slot 34 and a cutter-slot 35. The presser-foot has corresponding grooves for the movement of the cutter and feeding-blade.

In operation the disk 6 is given a rotary motion by the shaft 2 and the block is given a vertical reciprocal motion by the eccentrically-disposed pin 7 by means of the sliding bearing 9. This drives the cutter 8 and also operates the presser-foot. When the cutter goes down, it makes a hole in the leather which is fed to the machine. The means for feeding the leather to the cutter consists of theblade 29, which is given a transverse motion by means of the rock-shaft 21, which carries the bifurcated crank 31, the crank 31 engaging a pin 32. At the same time the lever 20 gives a vertical reciprocal motion to The feeder 29l and the cutter refeeder 29.

The point of the bladev ciprocate .in the same direction at the same time. The cutter goes down and cuts the hole and then starts up immediately. At the same time the feeder starts up and enters the hole made by the cutter. While the cutter is in the hole the block 30 shoves the feeder the distance between that hole and the neXt to be cut, &c.

Attention is called to the shape of the edges of the cutter 8. With the edges rounded, as

shown at right of Fig. 6, the cutter makes holes that will not tear or split.

Various changes may be made in constructing such machines without departing from my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A thong-hole-cutting machine comprising a reciprocating cutting-blade, feeding devices consisting of a blade reciprocating simultaneously with` said cutting-blade, and a presser-foot cooperating with said blades, and means for giving transverse reciprocal motion to said feeding-blade.

In testimony whereof I set my hand, in the presence of two witnesses, this 20th day of September, 1904.

CHARLES EBERLE. Witnesses:

A. L. JACKSON, J. W. SPAKE. 

